You open a new project/solution/whatever-you-call-it in your IDE of choice (I generally use Visual Studio 2010), add references to any AForge dlls you need (I'd start with AForge.dll, AForge.Math.dll, and AForge.Imaging.dll.), and start banging on your keyboard until something that approximates your desired result appears.

Then debug and modify until it actually is your desired result.

If you want a better answer, please tell us your problem, not your desire. For an explanation of the difference between these, see this essay. Applying the concepts listed over here would also be wise.Note that MJD and ESR have very different opinions on the use of not-English. I fall into the "busy hackers" category of recipients of messages in not-English.